More research would be needed on this, but I just web searched the addressee "Arthur H. Smythe, Columbus, Ohio" as it appears on your second cover and came up with a response that he may have had some involvement with one of the exhibits at the Columbian Exposition World's Fair. No guarantee it is the same person without further research, but it would be a nice addition to your cover if you could document the connection.
Here's the link where I found the initial information (check out first few sentences at top of page 554):
http://books.google.com/books?id=Mw...ge&q&f=false